BSc First Year (Sem 1 & 2) Chemistry – Daily Revision MCQ (English Medium)
This is the set for 26 October 2026. Solve today's MCQs →
Timed quiz: 15 seconds per question, the next one loads by itself when time runs out. Or solve without the timer: tap an option, right turns green, wrong turns red. New sets are added regularly.
Or scroll down and solve without the timer.
What is the maximum number of electrons that the third shell (n = 3) of an atom can hold?
Chapter 1: Atomic Structure
Show answer
Answer: B. 18
The maximum capacity of a shell is 2n²; for n = 3 it is 2 × 3² = 18.What is the hybridisation of each carbon atom in ethyne (C₂H₂)?
Chapter 3: Chemical Bonding
Show answer
Answer: C. sp
Each carbon in ethyne forms a triple bond and one single bond, so it is sp hybridised with a linear 180° shape.According to the Lewis concept, an acid is a species that:
Chapter 7: Acids and Bases (including HSAB)
Show answer
Answer: B. accepts an electron pair
Lewis defined an acid as an electron-pair acceptor (e.g. BF₃) and a base as an electron-pair donor.What is the pH of a 0.001 M solution of HCl (a strong acid, fully ionised)?
Chapter 9: Ionic Equilibria
Show answer
Answer: D. 3
[H⁺] = 0.001 = 10⁻³ M, so pH = −log[H⁺] = 3.A carbon atom bonded to four different atoms or groups is called:
Chapter 10: Stereochemistry
Show answer
Answer: A. a chiral (asymmetric) carbon
Four different groups on one carbon make it chiral, which can give optical isomers.By Markovnikov's rule, what is the main product when HBr adds to propene (no peroxide)?
Chapter 11: Hydrocarbons
Show answer
Answer: C. 2-bromopropane
H goes to the carbon that already has more H atoms, so Br attaches to the middle carbon: 2-bromopropane.Which compound gives a silver mirror with Tollens' reagent?
Chapter 14: Aldehydes and Ketones
Show answer
Answer: A. Acetaldehyde (ethanal)
Aldehydes are easily oxidised and reduce Tollens' reagent to metallic silver; ketones like acetone do not.A gas occupies 4 L at 1 atm. At the same temperature, what volume will it occupy at 2 atm?
Chapter 16: Gaseous State
Show answer
Answer: D. 2 L
Boyle's law: P₁V₁ = P₂V₂, so V₂ = (1 × 4) ÷ 2 = 2 L.How many atoms in total belong to one body-centred cubic (bcc) unit cell?
Chapter 18: Solid State
Show answer
Answer: B. 2
8 corners × ⅛ = 1, plus 1 atom at the body centre = 2 atoms per unit cell.For a process at constant temperature and pressure to be spontaneous, the Gibbs free energy change (ΔG) must be:
Chapter 19: Chemical Thermodynamics
Show answer
Answer: C. negative
At constant T and P a process is spontaneous when ΔG < 0; ΔG = 0 means equilibrium.
BSc First Year (Sem 1 & 2): MCQ in other subjects
All questions are written by PadhaiNotes in our own words from the common syllabus of Maharashtra universities (NEP). Your own university's syllabus may differ a little.